A very thin film in reflected white light appears

violet

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white

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black

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red

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Solution

The correct option is C black
When the film is thin, t $\to$ 0, path diff. = $λ$ \2. Therefore, in reflected light, the film appears black.

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A very thin film in reflected white light appears

The correct option is C blackWhen the film is thin, t → 0, path diff. = λ\2. Therefore, in reflected light, the film appears black.

The correct option is C black
When the film is thin, t $\to$ 0, path diff. = $λ$ \2. Therefore, in reflected light, the film appears black.